Pole attachment



Sept. 30, 1947. D, A K 2,428,186

POLE ATTACHMENT Filed June 21, 1946 2 Sheets-Sheet l 56 /5| l9 E i-::o9 5a L52 3 8 8 (900 FIG. 2 FIG.? FIG. 6 FIG,I

32 I I h \r g 44 5 2 35 Q53 INVENTOR.

LESTER D. WARWICK BY ATTORNEY Sept. 30, 1947.

L. D. WARWICK POLE ATTACHMENT Filed June 21, 1946 2 Sheets-Sheet 2 INVEN TOR.

LESTER D. WARWICK ATTORNEY Patented Sept. 30,1947 v 2,428,186

UNITED STATES PATEN OFFICE POLE ATTACHMENT Lester n. .Warwick, Deliver, 0010. Application June 21, 1946, Serial. Not 678,503

b 8 Claims. (01. 29419) '2 This invention relate toi mprovements in high 7 Figure 6 is a side elevation of a, pole employed voltage line maintenance equipment and has reffor attaching thedevicetoa cross arm; erence more particularly to an improved pole at- Figure 'T'is a ide elevation of a specially contachment for use in repairing and replacing structed pole'for' use in securing and'spreading broken insulators and cross arms, as Welles for transmission wires: f many other purposes. Figure 8 is "a view showing the attachment se- High voltage transmission lines of the type cured to one end of a cross arm and illustrates now extensively employed, require repairs to be how the Wire is supportedduring the replacement made from'time to time and since it is quite of an insulator," V essential that the power shall not "be disconnect- 1o Figure 9 isa section tak n on l ne 9- ieed during the time that the repairs are made, it m 8, h w a p tmn' f' th attac ment in is necessary for the linemen to be provided with p a n 94 c q a hi the proper equipment and the necessary training Figure 10 is QIVIEW showing the attachment in such position that repairs cansafely be madt'e,v I5 cured thereto for holding the wires position been recognized and various tools are available Flgure 11 Is a fragmentary edge elevation of on the market, that can be employed for the purhe attachment showing the manner in which it pose above indicated Such tools, however, alsecured to D though'they can be employed by properly trained III the drawing reference numeral I5 designates expensive and can be used only by persons who insulators 0f a y app oved construction. have been carefully trained to do so, Where a three-faced transmission circuit i used,

It is the object of this invention to produce a hr e insulators e r ged on the cross arm t particular operation 0 comprises-an insulator positioned on the top of ure 10 IS believed to be sufficient The pole atg gz ig g lig g gg fsg zi fgfz zg 5 2 x3 taohment which forms the sub ect of this inby means of a construction and an arrangement of gfiiig; lncluswe to which reference W111 Darts nOW be. desfribad and.. T116 tt h t st of a, bar is for this purpose reference will be had tothe acsplit downwardly from the upper end forming 'wmpanymg r e which the mvention two'fin'gers 20ithat are spread outwardly as shown been illustrated in its preferred form, and in which! right angles forming hooks 2! that terminate Figure 1 IS an edge elevation? View of the -indownwardly extending portions 22. The hooks pole attachment that forms the subject of this arg'provide d h 1101635 f a purpose which invention; will hereinafter appear.- Secured to the'outer Figure 2 is a front side elevation lookingiin the surface of ba is is a cross b za that may be direction of arrow-2m Figure 1; Figure 3 is a top plan view; 5015. Extendin Figure 4 is a fragmentaryside view to a someface oforossbar 24 is a lug 26' that has a threadwhat enlarged scale, looking in the direction of eel-opening": Extending" arrows 4 4, in Figures Band 5; g

Figure 5 is a-section taken on line 5-5, Fi'gicalends 2-9. vPositioneclf I ure 4; holes for the reception-pf lag screws 30 Whose square heads have been shown in Figure 2. At its lower end bar i9 is provided with a number of holes 31 to which reference will hereinafter be made. Secured to the outer surface of bar 19 is a circular insulator 32 which is made from some highly efiicient insulating material. The insulator must have, in addition to its high insulating properties, considerable strength and very low hygroscopic properties and any material that has these properties may be used. Insulator 32 has a cylindrical section of decreased diameter which has been designated by reference numeral 33. rial, having a cylindrical wall 35, is positioned against the outer end of insulator 32 and mounted for rotation about part 33. Insulator 32 is secured to bar l9 by means of screws 35' or bolts, and the openings 36 are plugged with insulating material 31. The insulating cap 34 is secured in place by means of a bolt 38 that serves as a pivot and permits the parts to rotate relative to each other, but holds them in operative relation. Cap 34 is provided with openings 39 for the reception of latching pins" that are used to hold the cap in rotary adjusted position. Insulae tor 32 is also provided with holes positioned at the same radial distance as holes 39 into which the latching pins project. One of these holes has been shown in Figure 4 and designated by numeral 4B.

Four stud bolts 4| are threadedly connected with cover 34 at points equidistant from its cen- Each bolt of the insulator. which a pigtail stick 48 W. Plate 45 is now removed and stick 48 positionedbetween rollers 43 afterwhich plate 45 is reapplied. Alive line block 49 andtreated rope 50 are now attached as shown in Figure 8.1 Of course a double block may be single block has been shown for the'purpose is attached to the wire rope is anchored. With wire W in the position shownin Figure may be replaced with safety, wire is lowered onto the insulator and secured to it by a suitable .tie wire. The pigtail stick is now removed. Reference is now made to Figure 9 which shows that after the attachment has been hooked over cross arm. [5, the threaded end 51 at the end of the insulating stick is inserted in the threaded-opening 21 in lug 25 and turned until the end of i engages the lower surface of the cross arm, whereupon the attachment will be securely attached to the-cross arm. In order to support the stick at-any given angle, a pin must be inserted in holes 39 and 40.

Let us now assume a case in which the cross arm. is to be replaced.- The-attachment is se cured to the post above the cross arm as shown in Figure by means shown in Figure 11. Two

or more lag screws A cap 34 of insulatin mate- The .tie wire is removed after employed if desired; the

8, the insulator after which the:

with suiiicient force to sink points 29 of pins 28 into the wood. Pigtail stick is now attached to the middle wire, after which it is secured in place between rollers 43 by plate 45. By means of the rope and block the wire is raised and held in elevated position by the gin pole 48.

Poles 5|, of approved insulating material, are now employed to support and spread the other two wires in a manner which will now be described. Pole .5! is provided at one end with a ferrule 52 to which is threadedly attached a hook 53. The other end has a ferrule 54 to which is threadedly attached a bolt 55 having a head 56 from one side of which a bolt 51 projects and this has a nut 58. Each side wire is engaged by a hook 53 and the stick turned until the stick; head 55 l0, hooks 65 engaging 30 are screwed into the P0815775.

the ferrule closes the opening into the hook, whereupon the wire will be firmly secured to and bolt 55 are now rotated length to permit bolt 51 to enter one of the holes 3|. The nut is now applied to bolt 51. After'both of the outside wires have been secured to the ends of sticks 5| and the latter pivotally connected with l9, the live line blocks 59 are attached as shown in Figure in holes 23. Tension is now applied to ropes 50A and the outside wires raised after which the ropes are securely anchored. The cross arm can now be removed and replaced after which the wires are lowered byareverse action, f

By the simple mechanism shown comprising the pole attachment, one gin pole 48 and two spreader sticks til, the wires are removed from the cross arm and held safely suspended, which, heretofore has required the use of a large number of sticks, ropes, blocks, strain breaks and other pieces of apparatus. The great simplicity is due to the use of the pole attachment shown in Figures l to 5 and to the specially constructed spreader stick shown in Figure 7, which will form the subject of another application.

Attention is called to Figure 10 and to the fact that when the attachment is lagged to the post, the hooks serve as anchors tor the blocks.

Having described the invention what is claimed asnew is:

l. A device of the class described, for use in to get the proper high tension line maintenance; comprising, a

substantially flat steel bar of Y'-shap e, the upper ends of the forked members being formed into hooksior engaging over a cross arm, clamping means for securing it to the cross arm, an insulator attached to the outer surface of the 'bar, a pivot extending outwardly fromthe insulator, an insulator attached to the pivot for rotation thereon, means for interlocking the two insulators in anyone of several rotary positions, and means for securing a gin pole to the outer insulator iorlongitudinal movement. I

2. A device in accordance with claim 1 in which a plurality of sharpened pins project from the rear surface of the bar and'in which the bar is provided with at least two openings for lag screws. 7

3. A device in accordance with claim 1 in which the hooks have openings for attaching a'block thereto, and in which the lower end of the bar-is provided with a plurality of openings.

4. A device of the class described, for use in high tension line live wire maintenance, comprising, a fiat metal bar-having two spaced, aligned hooks at its upperend for. engaging over a cross arm, meanscomprising a clamping device for engaging the under surface of a cross arm to secure the device in position thereon, an insulator secured to the outer surface of the bar, an insulator pivotally attached to the first insulator, means for latching the two insulators in any one of several relative rotary positions, a gin pole slidably connected with the second named insulator, and means comprising a rope and block, interconnecting the lower end of the gin pole and the lower end of the bar for moving the gin pole against an opposing force.

5. A device of the class described, for use in high tension line live wire maintenance, comprising, a fiat metal bar having two spaced, aligned hooks at its upper end for engaging over a cross arm, a lug projecting rearwardly from the bar at a point below the hooks, the lug having a transverse threaded opening for the reception of a clamping bolt, a cylindrical insulator secured to the outer surface of the bar, an insulator attached to the first mentioned one for movement about a pivot, means for holding the two insulators in assembled relation comprising a pivot, means for interlocking the two insulators in any of several relative rotary positions, the outer surface of the outer insulator having a guideway for the reception of a gin pole, a gin pole in said guideway and means comprising a rope and block for moving the gin pole in the direction of its length against an opposing force.

6. A device of the class described, for use in high tension line live wire maintenance and repair, comprising a metal bar having its upper end formed into two spaced hooksadapted to ,6 extend over a cross arm, insulators, one of which is attached to the side of the bar opposite from the hooks, means for interlocking the insulators in any of several angularly related positions, the outer insulator hav ing its outer surface provided with a guide Way, a gin pole, or the like, in the guide way, and means for moving the gin pole longitudinally against an opposing force.

7. -A device in the bar is provided, on its rear surface, with at least two pair of sharpened pins, and with at least one hole for a lag screw adjacent each pair of pins, the hooks having openings for anchoring blocks thereto.

8. An article of the class described, comprising a flat metal bar of Y-shape, the stem having a plurality of holes at its lower end, a plurality of pairs of sharpened pins projecting from its rear surface, there being at least one hole for the reception of a lag screw adjacent each pair of pins, the ends of the branches extending rearwardly at an angle of about degrees, the ends having holes for anchoring blocks thereto, and a two-part insulator on the front of the bar, one of the insulators being secured in fixed position and the other pivotally connected therewith the pivotally mounted insulator having a diametritwo relatively rotatable LESTER D. WARWICK.

accordance with claim 6 in which a 

